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Noun Named Entity
Categories: States and territories established in 1172, Pages using infobox country or infobox former country with the flag caption or type parameters, 12th-century establishments in Poland, Duchies of Silesia
EN
Duchy of Opole  Duchy of Oppeln  Herzogtum Oppeln  Principality of Opole  Principality of Oppeln
EN
Duchy of Opole was one of the duchies of Silesia ruled by the Piast dynasty. Wikipedia
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EN
Duchy of Opole was one of the duchies of Silesia ruled by the Piast dynasty. Wikipedia
One of the duchies of Silesia Wikidata
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